Antarctica unexpectedly gained ice mass – what is happening

Since 2020, the Antarctic ice sheet has accumulated about 700 billion tons of ice due to increased snowfall caused by changes in atmospheric circulation driven by ocean warming in the tropics. Scientists warn that this is a temporary phenomenon that does not reverse the long-term trend of global warming.

Since 2020, the Antarctic ice sheet has unexpectedly gained about 700 billion tons of mass, as recorded by satellite observations, including data from the NASA GRACE mission. Researchers attribute this increase not to a weakening of global warming but to its consequences: warming of the ocean at the meeting point of the western Pacific and eastern Indian Ocean altered atmospheric circulation. Between 2021 and 2023, this led to the formation of Rossby waves, which enhanced moisture transport to the continent. The additional moisture fell as snow, delivered by so-called atmospheric rivers. The main increase occurred in East Antarctica. Scientists emphasize that this is a temporary phenomenon: ice losses in West Antarctica continue, and the movement of ice toward the ocean is accelerating. Several years of growth do not signify a change in the long-term trend of global warming. The article references a publication in Popular Mechanics.